Class 7 Summer Holiday Homework
History for 7B (Aanchal Akka)
Complete watching the BBC series called 'The Incredible Human Journey'. Children should watch part 2,3,4 and 5 (Asia, Europe, Australia and The Americas) of the same series for the two weeks of instruction lost in school.
Maths (Tanuj Sir and parita akka)
Do the following worksheets
1. Think Maths 25
2. Design an Animal sanctuary
3. Think Maths yet again
Do the following problems from Nrich website:
1. Gabriel's problem https://nrich.maths.org/11750
2. Standard Index form matching https://nrich.maths.org/14530
3. Fractions and percentages card game.https://nrich.maths.org/2739
You could try your hand at other problems too.
Do some research on any one of the following:
1.Pi
2. Golden Ratio
3. Fractals
4. Pythagoras Theorem
Watch the following videos:
1. Indices https://www.youtube.com/watch?v=-zUmvpkhvW8
2.Volumes https://www.youtube.com/watch?v=qJwecTgce6c
3. Infinite hotel paradox https://www.youtube.com/watch?v=Uj3_KqkI9Zo
Science (Ranjit Sir)
Complete these 5 activities on Human Body. Follow the guidelines mentioned in the documents strictly.
Make sure you complete these activities in the order mentioned below.
Human body- Respiratory system (will be uploaded in few days)
Human body- Nervous system (will be uploaded in few days)
General Science, Reading projects:
1. Learn to make biscuits or bread. What are the scientific processes in making them at each stage. Write from your observations.
2. In the chemistry course, you made few indicators (from turmeric water and from beet root juice) in the lab to detect if some liquid is acid or base type. Now your job is to use turmeric paste on pieces of paper strips ( 0.5 inch X 4 inch) and dry them to make some litmus paper strips. You should dry them so that they can be stored and can be used in future when you want. You may use lemon juice, vinegar as acids and soap water, washing soda, baking soda, bleach as alkali. Make 10 strips at least. Write a short report about your work on this.
3. You also prepared hibiscus petal juice to make indicators in the lab. Can you experiment if some flower petals can be used directly to detect acids and bases? Try out as many colourful flowers in your area. You may use lemon juice, vinegar as acids and soap water, washing soda, baking soda, bleach as alkali. Write a short report about your work on this.
4. Identify the common household acidic and basic liquids using litmus paper or indicators prepared by you. Tabulate your finding.
5. Try to float a lemon (full lemon) in a glass of water. Add a spoon of salt and let it dissolve. Then try floating the lemon. If it sinks, repeat adding some more salt until the lemon floats. Why do you think the lemon floats?
6. Take one orange. Put it in a bucket of water. Does it float or sink? Take out the orange and just peel off the thick skin without separating the fruit. Now, put the whole fruit in the same bucket of water. Does it float or sink? Can you explain the difference and why?
7. This is just to make sure you know that air has weight. Take two balloons and inflate both. Tie so that air does not come out. Take a small stick and use it as a simple balance. Hang the balloons on each arm using threads and balance them by adjusting the pivot position (holding position). When balanced, the stick should be perfectly horizontal, just like a normal balance. Punch one of the balloons. If you have done a good job, then you find the other balloon is going low indicating it’s heavier.
Documentaries/Web resources:
These materials would need an internet connection. They are generally short (< 15 minutes) videos. However, few of them can be long. Watch the longer ones with a break every 20 minutes or so.
Space documentary: Voyager Space Probes
You can explore this web site to know about solar system planets and other objects in solar system: The Nine Planets
About gravity: How far would you have to go to escape gravity?
Learn about Mars Curiosity Rover
What is fire: Is fire a solid, a liquid, or a gas?
Why wash hands? How soap kills the corona virus
Microbes and antibiotic: What causes antibiotic resistance?